The Tor Browser / file comparison
comparison: media/libtheora/lib/info.c
media/libtheora/lib/info.c
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| -1:000000000000 | 0:aebdc110109b |
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| 1 /******************************************************************** | |
| 2 * * | |
| 3 * THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. * | |
| 4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * | |
| 5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * | |
| 6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * | |
| 7 * * | |
| 8 * THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009 * | |
| 9 * by the Xiph.Org Foundation and contributors http://www.xiph.org/ * | |
| 10 * * | |
| 11 ******************************************************************** | |
| 12 | |
| 13 function: | |
| 14 last mod: $Id: info.c 16503 2009-08-22 18:14:02Z giles $ | |
| 15 | |
| 16 ********************************************************************/ | |
| 17 | |
| 18 #include <stdlib.h> | |
| 19 #include <ctype.h> | |
| 20 #include <string.h> | |
| 21 #include "internal.h" | |
| 22 | |
| 23 | |
| 24 | |
| 25 /*This is more or less the same as strncasecmp, but that doesn't exist | |
| 26 everywhere, and this is a fairly trivial function, so we include it. | |
| 27 Note: We take advantage of the fact that we know _n is less than or equal to | |
| 28 the length of at least one of the strings.*/ | |
| 29 static int oc_tagcompare(const char *_s1,const char *_s2,int _n){ | |
| 30 int c; | |
| 31 for(c=0;c<_n;c++){ | |
| 32 if(toupper(_s1[c])!=toupper(_s2[c]))return !0; | |
| 33 } | |
| 34 return _s1[c]!='='; | |
| 35 } | |
| 36 | |
| 37 | |
| 38 | |
| 39 void th_info_init(th_info *_info){ | |
| 40 memset(_info,0,sizeof(*_info)); | |
| 41 _info->version_major=TH_VERSION_MAJOR; | |
| 42 _info->version_minor=TH_VERSION_MINOR; | |
| 43 _info->version_subminor=TH_VERSION_SUB; | |
| 44 _info->keyframe_granule_shift=6; | |
| 45 } | |
| 46 | |
| 47 void th_info_clear(th_info *_info){ | |
| 48 memset(_info,0,sizeof(*_info)); | |
| 49 } | |
| 50 | |
| 51 | |
| 52 | |
| 53 void th_comment_init(th_comment *_tc){ | |
| 54 memset(_tc,0,sizeof(*_tc)); | |
| 55 } | |
| 56 | |
| 57 void th_comment_add(th_comment *_tc,char *_comment){ | |
| 58 char **user_comments; | |
| 59 int *comment_lengths; | |
| 60 int comment_len; | |
| 61 user_comments=_ogg_realloc(_tc->user_comments, | |
| 62 (_tc->comments+2)*sizeof(*_tc->user_comments)); | |
| 63 if(user_comments==NULL)return; | |
| 64 _tc->user_comments=user_comments; | |
| 65 comment_lengths=_ogg_realloc(_tc->comment_lengths, | |
| 66 (_tc->comments+2)*sizeof(*_tc->comment_lengths)); | |
| 67 if(comment_lengths==NULL)return; | |
| 68 _tc->comment_lengths=comment_lengths; | |
| 69 comment_len=strlen(_comment); | |
| 70 comment_lengths[_tc->comments]=comment_len; | |
| 71 user_comments[_tc->comments]=_ogg_malloc(comment_len+1); | |
| 72 if(user_comments[_tc->comments]==NULL)return; | |
| 73 memcpy(_tc->user_comments[_tc->comments],_comment,comment_len+1); | |
| 74 _tc->comments++; | |
| 75 _tc->user_comments[_tc->comments]=NULL; | |
| 76 } | |
| 77 | |
| 78 void th_comment_add_tag(th_comment *_tc,char *_tag,char *_val){ | |
| 79 char *comment; | |
| 80 int tag_len; | |
| 81 int val_len; | |
| 82 tag_len=strlen(_tag); | |
| 83 val_len=strlen(_val); | |
| 84 /*+2 for '=' and '\0'.*/ | |
| 85 comment=_ogg_malloc(tag_len+val_len+2); | |
| 86 if(comment==NULL)return; | |
| 87 memcpy(comment,_tag,tag_len); | |
| 88 comment[tag_len]='='; | |
| 89 memcpy(comment+tag_len+1,_val,val_len+1); | |
| 90 th_comment_add(_tc,comment); | |
| 91 _ogg_free(comment); | |
| 92 } | |
| 93 | |
| 94 char *th_comment_query(th_comment *_tc,char *_tag,int _count){ | |
| 95 long i; | |
| 96 int found; | |
| 97 int tag_len; | |
| 98 tag_len=strlen(_tag); | |
| 99 found=0; | |
| 100 for(i=0;i<_tc->comments;i++){ | |
| 101 if(!oc_tagcompare(_tc->user_comments[i],_tag,tag_len)){ | |
| 102 /*We return a pointer to the data, not a copy.*/ | |
| 103 if(_count==found++)return _tc->user_comments[i]+tag_len+1; | |
| 104 } | |
| 105 } | |
| 106 /*Didn't find anything.*/ | |
| 107 return NULL; | |
| 108 } | |
| 109 | |
| 110 int th_comment_query_count(th_comment *_tc,char *_tag){ | |
| 111 long i; | |
| 112 int tag_len; | |
| 113 int count; | |
| 114 tag_len=strlen(_tag); | |
| 115 count=0; | |
| 116 for(i=0;i<_tc->comments;i++){ | |
| 117 if(!oc_tagcompare(_tc->user_comments[i],_tag,tag_len))count++; | |
| 118 } | |
| 119 return count; | |
| 120 } | |
| 121 | |
| 122 void th_comment_clear(th_comment *_tc){ | |
| 123 if(_tc!=NULL){ | |
| 124 long i; | |
| 125 for(i=0;i<_tc->comments;i++)_ogg_free(_tc->user_comments[i]); | |
| 126 _ogg_free(_tc->user_comments); | |
| 127 _ogg_free(_tc->comment_lengths); | |
| 128 _ogg_free(_tc->vendor); | |
| 129 memset(_tc,0,sizeof(*_tc)); | |
| 130 } | |
| 131 } |
